In the African American culture "pull the plug" is not in it. African Americans are not willing to even sign papers that approve of that, pre surgery.
I saw a PBS Frontline a few years ago about urgent care rooms that had African American patients who had basically died. The Hospitals could never get permission to not only just pull the plug- but to remove the coma patients from the room to make way for patients who COULD be saved.
One nurse in the documentary said "I don't want to sound like a racist".. She then said what I wrote.
Interestingly, I dated a ER nurse for a few years and asked her if that was true. "YES!" she said..like I had stumbled on to a big secret to be revealed. The GF of mine was a person of color. She went on to say seeing people linger in mid death like that made her tell her son to never allow that- "pull the plug".